Will Solvit and the Battle of the Ninjas

From Author Wars - https://authorwars.com/books/will-solvit-and-the-battle-of-the-ninjas-1689240.html

Overview:

Title: Will Solvit and the Battle of the Ninjas
Author: Rachel Elliot
Year: 2010
Type: Novels
Series: Will Solvit
Number in Series: 9

Variant Titles:

2010. Will Solvit and the Battle of the Ninjas

Genres/Themes:

juvenile sf